<!-- 首页 -->
<template>
<el-container class="home_container">
  <!-- 头部 -->
  <el-header>
    <div>
      <img src="../assets/heima.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 主体 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse? '64px' : '200px'">
      <div class="toggle_button" @click="toggleCollapse">|||</div>
      <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF"
      :unique-opened="true"
      :collapse="isCollapse"
      :collapse-transition="false"
      :router="true"
      :default-active="activePath">
        <!-- el-submenu是一级菜单 el-menu-item是二级菜单-->
        <el-submenu
        :index="item.id + ''"
        v-for="item in menuList"
        :key="item.id">
          <template slot="title">
            <i :class="iconObj[item.id]"></i>
            <span>{{item.authName}}</span>
          </template>
          <el-menu-item
          :index="'/' + subItem.path"
          v-for="subItem in item.children"
          :key="subItem.id"
          @click="saveNavState('/' + subItem.path)">
          <i class="el-icon-menu"></i>
          <span>{{subItem.authName}}</span>
          </el-menu-item>
        </el-submenu>
      </el-menu>
    </el-aside>
    <!-- 右侧内容主体 -->
    <el-main>
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>

export default {
  name: 'Home',
  components: {},
  data () {
    return {
      // 左侧菜单数据
      menuList: [],
      // 左侧的不同图标，通过对应各自id来配对字体图标
      iconObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取侧边栏的菜单数据
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 点击收缩菜单
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  },
  computed: {},
  watch: {},
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  mounted () {

  }
}
</script>
<style lang="less" scoped>
  .home_container{
    height: 100%;
    .el-header{
      background-color: #373d41;
      display: flex;
      justify-content: space-between;
      padding-left: 0;
      align-items: center;
      color: #fff;
      font-size: 20px;
      > div {
        display: flex;
        align-items: center;
        span {
          margin-left: 15px;
        }
      }
    }
    .el-aside{
      background-color: #333744;
      .el-menu{
        border-right: 0;
        .iconfont{
          margin-right: 10px;
        }
      }
    }
    .toggle_button{
      background-color: #4A5064;
      font-size: 10px;
      color: #fff;
      line-height: 24px;
      text-align: center;
      cursor: pointer;
      letter-spacing: 0.2em;
    }
    .el-main{
      background-color: #eaedf1;
    }
  }
</style>
